Homolytic aromatic substitution. Part XXXIV. Major products from the reaction of benzoyl peroxide with p-disubstituted benzenes
作者:D. I. Davies、D. H. Hey、B. Summers
DOI:10.1039/j39700002653
日期:——
p-tolyl sulphide, or methyl p-tolyl sulphoxide. The major reaction is oxidation at the sulphur atom, which leads to the formation of, in addition to benzoic anhydride, arylthiomethyl and arylsulphinylmethyl benzoates from the aryl sulphides and sulphoxides respectively. There is no evidence that free radicals are involved in the reaction of benzoyl peroxide with these sulphur-containing compounds.
[EN] METHOD FOR INCORPORATING PROTECTING ACETAL AND ACETAL ESTER GROUPS, AND ITS APPLICATION FOR THE PROTECTION OF HYDROXYL FUNCTION<br/>[FR] PROCÉDÉ POUR INCORPORER DES GROUPES ACÉTAL ET ESTER D'ACÉTAL PROTECTEURS ET SON APPLICATION POUR LA PROTECTION DE LA FONCTION HYDROXYLE
申请人:INST CHEMII BIOORG POLSKIEJ AKADEMII NAUK
公开号:WO2014148928A1
公开(公告)日:2014-09-25
The present invention is the method for incorporation of acetal and acetal ester groups for protection of hydroxyl function. The method is applied in particular in the processes of RNA synthesis. The method can be employed in the synthesis of nucleosides with acetal and acetal ester groups for the protection of hydroxyl functions. The method according to the invention consists of the reaction of an organic compound containing at least one hydroxyl group, soluble in an aprotic solvent, with a compound of the general formula 1, R1 -S-CH2 -O-R2(1) in the presence of SnCl4, in an aprotic solvent. In the second aspect, the present invention is the method of protecting the hydroxyl function, particularly in position 2', in nucleoside derivatives, based on the incorporation of an acetal or acetal ester group.
Gold-Catalyzed, Iodine(III)-Mediated Direct Acyloxylation of the Unactivated C(sp<sup>3</sup>)-H Bonds of Methyl Sulfides
作者:Sheng-rong Guo、Pailla Santhosh Kumar、Yan-qin Yuan、Ming-hua Yang
DOI:10.1002/ejoc.201600632
日期:2016.9
An efficient reaction for the iodine(III)‐mediated acyloxylation of the unactivated C(sp3)–H bonds of methyl sulfides is reported. This strategy utilizes various hypervalent iodine reagents and involves an ionic pathway to deliver the desired products in excellent yields (DCE = 1,2‐dichloroethane).
Direct α-acyloxylation of organic sulfides with the hypervalent (diacyloxyiodo)benzene/tetra-n-butylammonium bromide (TBAB) reagent combination
作者:Dan Zhu、Denghu Chang、Shaoyan Gan、Lei Shi
DOI:10.1039/c6ra01799a
日期:——
A novel metal-free approach to directly synthesize α-acyloxy sulfides from readily available alkyl sulfides utilizing the hypervalent (diacyloxyiodo)benzene and TBAB reagent combination is reported. This transformation is characterized by its broad substrate scope in moderate to excellent yields, convenient operating conditions and outstanding functional group tolerance.
Fe 2 O 3 -catalyzed Pummerer rearrangement of acyl chlorides and sulfoxides: Facile synthesis of alkylthiomethyl ester
作者:Haotian Xing、Long Chen、Yimin Jia、Zhongxing Jiang、Zhigang Yang
DOI:10.1016/j.tetlet.2017.04.053
日期:2017.6
A simple, effective approach for the Pummererrearrangement of acyl chlorides with sulfoxides by using a low-cost and more abundant Fe catalyst has been described. The alkylthiomethyl ester products were prepared in good to excellent yields for a range of different substrates including asymmetrical sulfoxides and acyl chlorides with a variety of functional groups under mild reaction conditions. The